Obviously i was talking about universally supporting different drivers not about incorporating different operating systems into it. Yes i agree that the most significant thing is that they built off of the core architecture of vista, but my point is that With my vista ultimate sp1 the compatibility wizard did not work for several of the older games like diablo that i liked to play. I tried to install Diablo in windows 7 with the compatibility of windows 2000 and it worked like a charm. Please stop trying to criticize someone until you understand the full meaning of what they are saying. Ask for their interpretation first.